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JDMIS' Gemmology Webinar
1 hour | Free Admission (U.P. $40)

Do you lack confidence in your gems & jewellery purchases?

Led by gemmologist and jewellery expert, Tanja Sadow, this 1-hour crash course will give you the most essential gemmological knowledge you need in identifying and valuing coloured gems and diamonds. You’ll discover the secrets to appreciating the gems & jewellery you already possess and empower yourself to make informed and inspired purchase decisions for your future adornments.

Comprehensive Topics

To Become A More Informed and Educated Buyer

Learn about the wide range of coloured gems, how they are classified and how to best appreciate their rare properties.

Learn the value factors like size, colour, cut and which you should focus on to get the best value gems for your budget!

See how the 4Cs applied specifically to help you better evaluate one of the most popular gemstones: Diamonds

Learn quick essential tips on how to look for telltale signs of non-genuine gems & pearls

The Instructor

Tanja Sadow

Tanja is an award-winning jewellery designer and gemmologist with more than 4 decades of experience educating the jewellery industry across 4 continents. As Dean and founder of JDMIS, Tanja trains teams from top jewellery brands and works with aspiring artisans to help them achieve brilliance in their careers.


Picture of JDMIS jewellery graduates

Founded in 2007, the Jewellery Design and Management International School (JDMIS) is a unique school in Asia providing Jewellery Design and Management Programs. JDMIS is Singapore’s only specialized jewellery school and offers end-to-end jewellery education, which includes Professional Certificate Courses leading to Diploma and Advanced Diploma. 

JDMIS welcomes industry professionals, jewellery enthusiasts and students with a passion for jewellery to explore the world of Jewellery Design, Fabrication and Business.

15 Years of Operation

20K Participants

5,500 Certified graduates

30+ Programmes


From Past Participants

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I would say that the teachers are very passionate and skilled. Students will get hands-on experience with good guidance and also life long contacts with students and teachers.

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JDMIS is truly awesome. Worth any time and money you invested in. Regardless of whether you are in the jewellery trade or not this is good knowledge.

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I love the way Tanja teach! The class were never bored as she fills the lessons with examples and stories related to the topic of the lessons.

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Very well organised and presented. Tanja is superb, could learn loads from her... Very excited to start making designs for myself.

Registration is Ending soon

Start Making More Informed Purchasing Decisions Today

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111 Middle Road #01-03/04, National Design Centre, Singapore 188969

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